showModalDialog与showModelessDialog区别
showModalDialog：被打开后就会始终保持输入焦点。除非对话框被关闭，否则用户无法切换到主窗口。类似alert的运行效果。
showModelessDialog：被打开后，用户可以随机切换输入焦点。对主窗口没有任何影响(最多是被挡住一下而以。)
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showModalDialog和showModelessDialog数据传递技巧。
window.showModalDialog("filename.htm",var_name);alert(window.dialogArguments) //读取var_name变量window.dialogArguments="oyiboy" //设置var_name变量 ?
window.showModalDialog("filename.html",window); alert(window.dialogArguments.var_name) //读取var_name变量window.dialogArguments.var_name="oyiboy" //设置var_name变量//同时我也可以操作var_id变量alert(window.dialogArguments.var_id) //读取var_id变量window.dialogArguments.var_id="001" //设置var_id变量 ?响应.do请求，数据传递
<script language="JavaScript" type="text/JavaScript">var message = window.showModalDialog("bookingDaysCommentOpen.do?selectDate="+date, window,"dialogWidth =420px;dialogHeight =380px;help=0");if (message=="refresh"){ window.location.reload();}</script><script language="JavaScript" type="text/JavaScript">//传递的参数var obj = window.dialogArguments;//向打开对话框的窗口返回信息window.returnValue="refresh"; </script>?